Machine quantity controlling device, energy supplying system, machine quantity controlling method, and program
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Solution Overview
Problem
Existing heat source systems with waste heat recovery type absorption chillers face inefficiencies due to changes in load factors not accounted for by previous technologies, which affect the overall operational efficiency of the system.
Innovation Solution
A machine quantity controlling device that determines optimal load ranges for waste heat recovery type absorption chillers and other heat source devices based on cooling water temperature and waste heat utilization, adjusting the operation of multiple heat source devices to match the required load efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the heat source system operates multiple heat source devices to meet varying load requirements, then the system can adapt to different load conditions, but the operational efficiency decreases when suboptimal devices are operated outside their optimal load ranges
Solution Approach 1:
The control device dynamically determines optimal load ranges for each heat source device based on real-time operating conditions, and dynamically adjusts which devices operate and at what loads. This dynamic adaptation allows the system to maintain high efficiency across varying load conditions by continuously optimizing the operational configuration.
Solution Approach 2:
The system changes operational parameters (which devices operate, their individual load factors) based on the determined optimal load ranges. By adjusting these parameters according to real-time conditions and pre-determined optimal ranges, the system achieves both adaptability to load changes and maintenance of operational efficiency.
2Use of energy by moving object
If the system prioritizes using waste heat recovery type absorption chillers to reduce fuel gas consumption, then energy cost decreases, but the system cannot adequately respond to changes in waste heat availability and cooling water temperature
Solution Approach 1:
The control device uses feedback from cooling water temperature measurements and waste heat availability data to determine the optimal load range for absorption chillers. This feedback mechanism allows the system to adjust its operation to maintain efficiency while responding appropriately to changing environmental and operational conditions.
Solution Approach 2:
The system dynamically adjusts the operational strategy for absorption chillers based on real-time conditions. When waste heat availability and cooling water temperature are favorable, the system maximizes absorption chiller usage to reduce fuel consumption. When conditions are unfavorable, it adjusts the operational configuration to maintain system efficiency.
3Productivity
If the system operates heat source devices at higher loads to meet increased demand, then the load capacity increases, but the operational efficiency decreases when devices operate outside their optimal load ranges
Solution Approach 1:
The control device segments the total load requirement and distributes it among multiple heat source devices according to their individual optimal load ranges. By dividing the total load into segments that each device can handle efficiently, the system achieves high overall load capacity while maintaining operational efficiency of individual devices.
Solution Approach 2:
The system dynamically determines how to segment and distribute the load based on real-time conditions and pre-determined optimal ranges. This dynamic load segmentation allows the system to scale capacity up or down while ensuring each operating device remains within its efficient operational zone.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system operates with improved efficiency by optimizing the load distribution across different heat source devices, reducing energy consumption and costs while maintaining or exceeding the required load capacity.
Implementation Method 1
a first heat source device, which is a waste heat recovery type absorption chiller that generates chilled heating medium by receiving supply of at least one of waste heat and a fuel
Data Source
AI summary
A machine quantity controlling device which controls a quantity of a heat source device to operate in a heat source system including a first heat source device and a second heat source device, the first heat source device being a waste heat recovery type absorption chiller, the second heat source device other than a waste heat recovery type absorption chiller, the machine quantity controlling device including an acquisition unit that obtains a waste heat utilization maximum load which is a maximum load when the first heat source device receives only supply of the waste heat; a determination unit that determines a predetermined load range from the waste heat utilization maximum load to be a first optimal load range as an optimal load range of the first heat source device; and a machine quantity control unit that controls a quantity of the second heat source device to operate so that the sum of a total of minimum values of the optimal load range of the first heat source device to operate and a total of minimum values of a second optimal load range of the second heat source device to operate is smaller than or equal to a load required for the heat source system, and the sum of a total of maximum values of a first optimal load range and a total of maximum values of the second optimal load range is equal to or greater than the load required for the heat source system, the second optimal load range being an optimal load range of the second heat source device to operate.